This is the fifth report on international humanitarian law (IHL) and the challenges of contemporary armed conflicts prepared by the International Committee of the Red Cross (ICRC) for the International Conference of the Red Cross and Red Crescent (International Conference). Similar reports were submitted to the International Conferences held in 2003, 2007, 2011 and 2015. The aim of all these reports is to provide an overview of some of the challenges posed by contemporary armed conflicts for IHL; generate broader reflection on those challenges; and outline current or prospective ICRC action, positions, and areas of interest.